[PATCH v3 1/4] perf tools record: Modernize -W man page
Andi Kleen <[email protected]>
| Newsgroups | org.kernel.vger.linux-perf-users |
|---|---|
| Message-ID | <[email protected]> |
Modernize the -W / --weight description in the manpage to cover more cases that are supported now. Signed-off-by: Andi Kleen <[email protected]> --- tools/perf/Documentation/perf-record.txt | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt index 178f483140ed..2c6510c5a87b 100644 --- a/tools/perf/Documentation/perf-record.txt +++ b/tools/perf/Documentation/perf-record.txt @@ -480,9 +480,11 @@ Note that this feature may not be available on all processors. -W:: --weight:: -Enable weightened sampling. An additional weight is recorded per sample and can be -displayed with the weight and local_weight sort keys. This currently works for TSX -abort events and some memory events in precise mode on modern Intel CPUs. +Enable weighted sampling. One or more additional weights can be recorded per sample +and can be displayed with the weight, weight2, weight3 and local_weight sort keys. +Possible uses for weights are memory or instruction retirement latencies. +Support depends on the PMU and the event, as well as its configuration. Typically +it requires use of 'p'. --namespaces:: Record events of type PERF_RECORD_NAMESPACES. This enables 'cgroup_id' sort key. -- 2.55.0